CN216713336U - Double-limb spliced beam and steel pipe column and double-limb spliced beam assembly type beam column joint - Google Patents

Abstract

A double-limb split beam and an assembled beam-column node of a steel tube column and a double-limb split beam. Beam-assembled beam-column joints include steel pipe columns, I-shaped gusset plate modules with upper and lower stiffeners welded to the steel pipe columns, and cold-formed double-limb split beam members. The utility model uses the I-shaped connector with upper and lower stiffeners to strengthen the node domain, so that the plastic hinge of the node moves outward in the direction away from the column welding area, which effectively improves the The ductility of joints can be applied to the design of beam-column joints of cold-formed steel frames or rigid frames. The entire joint structure is reasonable, the force transmission is clear, the seismic performance is good, the construction site does not need welding operations, the overall installation speed is fast, and the construction cost is low.

Description

Double-limb split beam and assembled beam-column joint of steel tube column and double-limb split beam

technical field

The utility model belongs to the field of building structure engineering, and relates to a double-limb split beam and an assembled beam-column joint of a steel pipe column and a double-limb split beam.

Background technique

In the development of prefabricated steel structure buildings, it is advocated to use rolled steel as the basic components to facilitate the standardization of products at the component level. As one of the members of the construction industry steel, cold-formed steel is processed by rolling or stamping at room temperature to produce various high-efficiency stress sections that are difficult to produce by hot-rolling methods, so as to achieve the goal of lightweight design of steel structures .

However, the current application of cold-formed steel in my country's construction industry has always been dominated by the cold-formed thin-walled steel (often called "light steel") keel-type residential structure system. At present, the frame beams and column members of the cold-formed thin-walled steel structure system generally use I and T-shaped sections composed of double-limb or four-limb channel steel, and then use T-shaped or cross-shaped gusset plates at the beam-column joints for connection. Such traditional cold-formed thin-walled steel joints often suffer damage to the joint domain itself under the action of loads, and fail to achieve the seismic design goal of "strong joints and weak members", resulting in the inability to be directly applied to multi-story frame structures.

In steel structure buildings, beam-column joints have a significant impact on structural force transmission, project cost, and construction difficulty. The upper and lower flanges of the beams of the traditional fully welded beam-column rigid joints are fully penetration welded. During the construction, they need to be installed and positioned before welding, and the construction period is long. At the same time, due to the high-altitude operation, it is difficult to guarantee the quality of the welds. Under the action of strong earthquakes, the potential weld defects can easily cause brittle failure at the connection nodes, and may lead to the overall collapse of the structure. In addition, when the above-mentioned traditional beam-column rigid joints are spliced on site, additional welding lugs need to be added to the upper flanges of the beams for the convenience of positioning. After the joints are constructed, they need to be removed, which is time-consuming and labor-intensive. Therefore, if all-welded rigid joints are used for cold-formed steel pipe columns and double-limb composite beams, the joints will not only suffer from unfavorable forces, but also do not meet the development needs of construction industrialization.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a double-limb spliced beam that improves the torsional rigidity and flexural bearing capacity of the beam, and uses high-strength bolts to connect the beam and the column, so as to avoid the construction site. Weld defects caused by welding, reduce labor intensity, improve construction quality, effectively improve the mechanical properties of joints, and avoid steel pipe columns and double-limb split beams assembled beam-column joints that are damaged in the joint domain.

In order to achieve the above purpose, the utility model includes: a double-limb spliced beam, comprising two symmetrically placed channel steels, and the webs of the two channel steel members pass through a plurality of web connecting plates arranged along the length direction of the channel steels They are connected to each other, so that the connecting end webs of the two channel steel members form a distance for connection that matches the thickness of the web connecting plate, and the webs and the flanges of the channel steel connecting ends are provided with bolt holes for the connection. The double-limb split beam is a split beam with symmetrical section formed by double-limb channel steel. The single-limb channel steel forming the split beam can be made by cold bending, which is convenient to process and flexible and efficient in section. The split beam is made of double-limb channel steel through the web connecting plates arranged at a certain interval to form a biaxially symmetrical section beam, which greatly improves the torsional rigidity and bending bearing capacity of the beam.

In this embodiment, the web connecting plate and the channel steel branch are connected by bolts.

In this embodiment, the flanges of the channel steel are flanges with curling edges.

In this embodiment, the double-limb split beam is a cold-formed double-limb split beam. The cold-formed double-limb split beam can achieve greater torsional stiffness and flexural bearing capacity.

In this embodiment, the channel steel is a channel steel with web stiffening.

The utility model also includes a beam-column joint assembled with a steel pipe column and a double-limb spliced beam, including the above-mentioned double-limb spliced beam, and an I-shaped gusset plate module is welded on the steel pipe column, and the I-shaped gusset plate module includes The upper wedge-shaped stiffening steel plate, the I-shaped connecting piece and the lower wedge-shaped stiffening steel plate, the I-shaped connecting piece is welded on the connecting side of the steel pipe column, and one side of the upper wedge-shaped stiffening steel plate and the lower wedge-shaped stiffening steel plate are respectively welded on the workpiece. The center and the other side of the flanges on the upper and lower sides of the I-shaped connecting piece are welded on the steel pipe column. Bolt holes corresponding to the double-limb split beam are provided on the flange and the web of the letter-shaped connecting piece, and the I-shaped connecting piece and the double-limb split beam are connected by high-strength bolts.

In this embodiment, the clear distance between the upper and lower flanges of the I-shaped connector matches the height of the outer contour of the double-limb split beam.

In this embodiment, the steel tube column includes a square or rectangular steel tube column, and the steel tube column can be filled with concrete to form a concrete-filled steel tube column.

Due to the above structure, the utility model utilizes the I-shaped gusset plate module with upper and lower stiffeners to strengthen the junction domain, which can effectively improve the stiffness and ductility of the junction, the entire junction has clear force transmission and good seismic performance, and the utility model When the I-shaped gusset plate module is manufactured in the factory, the effective control of the distribution of the concentrated area of plastic deformation can be realized by adjusting the size of the gusset plate module according to the actual situation. The I-shaped gusset plate module with upper and lower stiffening ribs adopted by the utility model is welded and assembled with the steel pipe column in the factory, and the cold-formed double-limb spliced beam member is connected and completed by high-strength bolts at the construction site, so that no welding operation is realized on site. Some steel structure joint construction methods not only improve the construction efficiency, but also ensure the stiffness, bearing capacity and ductility of the joints.

To sum up, the utility model can be applied to the joint connection between the steel pipe column and the double-limb composite beam, and the joint domain is strengthened by the I-shaped joint plate module with upper and lower stiffeners, and the outward movement of the joint plastic hinge is realized. , the bearing capacity of the negative bending moment area of the beam end is effectively improved, the design of the whole node is reasonable, and the performance is good; at the same time, the components used in the utility model can realize factory prefabrication and mass production. It can not only improve production efficiency but also ensure the quality of components.

Description of drawings

Fig. 1 is the front view of the joint structure of the web flat steel beam of the present invention.

FIG. 2 is a side view of the node structure of the web flat steel beam of the present invention.

FIG. 3 is a top view of the node structure of the web flat steel beam of the present invention.

FIG. 4 is a schematic structural diagram of the web flat steel beam of the present invention.

FIG. 5 is a front view of the node structure of the web stiffened steel beam of the present invention.

6 is a side view of the node structure of the web stiffened steel beam of the present invention.

FIG. 7 is a top view of the node structure of the web stiffened steel beam of the present invention.

In the drawings, 1. Steel pipe column; 2. I-shaped gusset plate module; 3. Double-limb spliced beam; 4. High-strength bolts; 5. Web connecting plate.

Detailed ways

In order to enable those skilled in the art to better understand the present invention, the technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

As shown in Figures 1 to 7, a steel pipe column and a double-limb split beam assembled beam-column joint includes a square or rectangular steel pipe column 1, an I-shaped gusset plate module 2 with upper and lower stiffeners welded to the steel pipe column 1, and Cold-formed double-limb split beam member 3, the cold-formed double-limb split beam member includes two symmetrically placed channel steels, and the webs of the two channel steels are connected to each other through a plurality of web connecting plates 5 arranged along the length direction of the channel steels. Connection, so that the connecting end webs of the two channel steels form a spacing for connection that matches the thickness of the web connecting plate 5, and the webs and flanges of the channel steel connecting ends are provided with connecting bolt holes,

The steel pipe column 1 is welded with an I-shaped gusset plate module 2, and the I-shaped gusset plate module 2 includes an upper wedge-shaped stiffening steel plate, an I-shaped connecting piece and a lower wedge-shaped stiffening steel plate, and the I-shaped connecting piece is welded. On the connection side of the steel pipe column 1, one side of the upper wedge-shaped stiffening steel plate and the lower wedge-shaped stiffening steel plate are welded to the center of the upper and lower flanges of the I-shaped connector respectively, and the other side is welded to the steel pipe column 1. The thickness of the web of the I-shaped connector matches the spacing between the two channel steel webs of the double-limb split beam 3, and the flanges and webs of the I-shaped connector are provided with corresponding double-limb split beams. Bolt holes, the clear distance between the upper and lower flanges of the I-shaped connector matches the height of the outer contour of the double-limb split beam 3 , and the I-shaped connector and the double-limb split beam 3 are connected by high-strength bolts 4 .

The construction includes the following steps:

a. According to the size and shape of the cold-formed double-limb split beam 3, determine the size of the I-shaped gusset plate module 2 with upper and lower stiffeners welded to the steel pipe column 1, and design the position and arrangement of the bolt holes;

b. The cold-formed double-limb split beam 3 is made, and the two channel steels are combined between the parts outside the range of the beam node domain by a plurality of web connecting plates 5 arranged between the webs, and the high-strength bolts 4 are used for the joint to connect. fixed.

c. Transport the assembled cold-formed double-limb split beam 3 to the site, and connect and fix the upper and lower flanges of the channel steel of the cold-formed double-limb split beam 3 with the flanges of the I-shaped connector through high-strength bolts 4.

d. The cold-formed cold-formed double-limb split beam 3 is inserted into the web of the I-shaped connector by using the spacing between the two channel steels, and then the two are connected by high-strength bolts 4 .

Thus, the upper and lower flanges and the web of the I-shaped connector are connected with the cold-formed double-limb split beam 3 through high-strength bolts 4 to form a complete node.

Through the simulation analysis of the finite element software ABAQUS, the traditional welded joints and the utility model are subjected to finite element modeling analysis. The simulation results meet the design requirements. It can be seen that compared with the traditional beam-column welded joints, the utility model realizes the plastic deformation of the joints. In the further simulation analysis, it is concluded that by changing the size of the I-shaped gusset plate module along the length of the split beam, the distribution of the concentrated area of plastic deformation can be effectively controlled, and the overall ductility and seismic loss of the joint can be improved. purpose of ability.

The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims (8)

1. A kind of double-limb split beam, characterized by: including the channel-section steel that two symmetries were placed, two the web of channel-section steel passes through web connecting plate (5) interconnect that the polylith laid along channel-section steel length direction, makes two the link of channel-section steel forms between the web with web connecting plate (5) thickness assorted interval, all be equipped with the bolt hole that is used for the connection on the web of channel-section steel link and the pterygoid lamina.

2. The bipedal girder of claim 1, wherein: the web connecting plate (5) is connected with the channel steel through bolts.

3. The bipedal girder of claim 1, wherein: and the wing plate of the channel steel is a wing plate with a turned edge.

4. The bipedal girder of claim 1, wherein: the double-limb spliced beam is a cold bending type double-limb spliced beam.

5. The bipedal girder according to any one of claims 1 to 4, wherein: the channel steel is stiffened with a web plate.

6. The utility model provides a steel-pipe column and two limbs amalgamation roof beam assembled beam column nodes which characterized in that: the double-limb split beam comprises an I-shaped gusset plate module (2) for connecting a steel pipe column (1) and the double-limb split beam (3) as claimed in any one of claims 1 to 5, wherein the I-shaped gusset plate module (2) is welded on the steel pipe column (1), the I-shaped gusset plate module (2) comprises an upper wedge-shaped stiffening steel plate, an I-shaped connecting piece and a lower wedge-shaped stiffening steel plate, the I-shaped connecting piece is welded on the connecting side of the steel pipe column (1), one sides of the upper wedge-shaped stiffening steel plate and the lower wedge-shaped stiffening steel plate are respectively welded at the centers of wing plates on the upper side and the lower side of the I-shaped connecting piece, the other sides of the upper wedge-shaped stiffening steel plate and the lower wedge-shaped stiffening steel plate are welded on the steel pipe column (1), the thickness of the web plate of the I-shaped connecting piece is matched with the distance between the web plates of the two channel steels of the double-limb split beam (3), and bolt holes corresponding to the connecting ends of the double-limb split beam are arranged on the flange and the web plates of the I-shaped connecting piece, the I-shaped connecting piece is connected with the double-limb spliced beam (3) through a high-strength bolt (4).

7. The steel pipe column and double-limb split beam assembly type beam column joint as claimed in claim 6, wherein: the clear distance between the upper flange and the lower flange of the I-shaped connecting piece is matched with the height of the outer contour of the double-limb split beam (3).

8. The steel pipe column and double-limb split beam fabricated beam column joint as claimed in claim 6, wherein: the steel pipe column (1) comprises a square or rectangular steel pipe column (1), and concrete can be filled in the steel pipe column to form a steel pipe concrete column.

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